package com.heyun.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.heyun.bean.HeyunEmp;

/**
 * Servlet Filter implementation class UserFilter
 */
@WebFilter("/manage/*")
public class UserFilter implements Filter {

    /**
     * Default constructor. 
     */
    public UserFilter() {
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		// TODO Auto-generated method stub
		// place your code here

		// pass the request along the filter chain
		 HttpServletRequest req=(HttpServletRequest) request;
		 HttpServletResponse res=(HttpServletResponse) response;
		 HeyunEmp user =(HeyunEmp) req.getSession().getAttribute("user");
		 if(user!=null){
			 chain.doFilter(request, response);	
		 }else{
			 res.sendRedirect("../login.jsp");
		 }
		
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		// TODO Auto-generated method stub
	}

}
